Electric lamp.



UNITED STATES PATENT OFFICE.

EUGENE A. KUEN, or CINCINNATI, oH1o, AssIGNoPL, BY M-EsNE ASSIGNMENTS, To THE @Noonan-VICTOR COMPANY, or CINCINNATL 01110, A CORPORATION or OHIO.

ELECTRIC LAMP.

Application led August 2, 1915. Serial No. 43,184.

To all whom t may concern: 'Be it knovvnthat I, EUGENE A. KUEN, a

Vcitizen of the United States, residing at Cin-` cinnati, in the county of'Hamilton and State 5 of Ohio, have invented ertain new and useful Improyementsl 'in' lectric Lamps, of which the following is a specification.

My invention relates to electric lamps applicable fo'r instanceas headlightsfor automobiles onother vehicles, and has for its ob- '-jectthe provision of novel means which are readilyl assembled for adjusting the incandescent lellectric light-bulb to proper focus socket at oneof its limits of rotative adjust-l soeket at the other of its limits of rotative ad] ustmlent.

vice in'separated relationFig. 8 isan axial section of 'myimproved ldevice, Y illustrating its application'to a doubleended socket; and

t. l v I i f i I. l I I Specification of Letters Patent. Patented Dec. 12, 1916.

ment. Fig. 6 is a similar-:view showing the Fig. 7 .'is'i'a. perspective y 'vievvshowing the-main parts of my improved de- Fig. 9 is' an axial .sectionfofvwthe same on the line 9-7-9 of Fig. 8.

My invention is an improvement upon the electric lamps shown, described'and' claimed in Letters Patent No. -1,140,893"`and No.

`1-,140,894,granted Charles Harry Fischer,

May 25, 1915.

In the present exemplification of my invention, the outer casing issho'wn at 11' and l Ilight-bulb is arranged to be adjusted in the f line ofI the principal axis of the reflector so as `tofadjust the electric'light-bulb to the dethe reflector atv12, the lreflectlnbeing shown as o f general parabolic form." It is shown recelved in and securedto the outer casing sired focus in the reflector, either axially or rotatively', or in directions which are the sum of'saidaxial and' rotative movements,

and for limiting said movements; further to 2,5 provide novel means for limiting rotative movement of the socket-member, for instance for avoiding tangling or excessivebending -of the iiexible electric conductor or conductors forthefsocket; further to provide novel 39 means for limiting vaxial movement of the vs'o1 3ket, whereby a plug may b e readily conf .,nected With the socket by means of a v bayonet connection; further to provide novel meansv whereby the axial movement of -the 3 5 socket in either `'direction is limited'for permitting the ready .attachment of a plug at x, either `end vof: Said socket.

The invention vvlll be further readily understood from the following description and t0 claims, and from the drawingsin 'which latter:

Figure lis an axial section of anelectric lamp embodying my invention, the socket being shown' in side elevation. Fig. 2 is a side elevation oflmy .improved device, the lamp-niembers and the electric light-bulb being shown partly broken away. Fig. 3 is van axial section of my improved device, taken on theline 3--3 ofElg. 2. Fig. i

50 is a'. crossssection ot improved device,

taken on the line of Fig. 2, shoiving the socket in a. position of rotative adwstment intermediate of itsy limits of-.rotative ad]ust ment. Fig. 5 is asimilar view showing the in suitable manner, as by fscrevvs'l, for

forming the body of the lamp as aI double 4 Walled body, the rou ter"vvall y`of Whichis formed by the outer vcasing and the 'inner Wall by the reflector, there being aspacel Y between said Walls, invvhich, inthe present exempliiication,l the inea-lisier permitting adjustment of the socket' andfor maintaining the socket in adjusted positionsare contained. t V

The front closure of'the'lamp'is vshovvn at- 15, and is exemplified "as aldoor provided with a glass 16. The door is suitably vmountA edon the body, as by means'of hinges 17, or the casing, reflector anddoorf may be suit-l ably connected together in other manner, so that if it is desired to have ready access to the electric light-bulb,fshovvn at 18, the front closure may be readily removed in order that adjustmenty of the light-b1ilb to the desired 'focus may be obtai ed yby the manual handling of the lightulb. If desired, hovvever, the adjustmentv to the desired focus may be obtained from 'the outside of the lamp-body, as hereinafter describedV and as illustrated in Figs. 8 and 9.

*A socket-member .is pro electric light-bulb is arranged to be secured,`

vided, a) which me.

this socket-member beingv 'instanced 'as a` I socket-tube 21 receivedl in` a l'central aperture l i 22 of the reflector. A 'flange'QS acts to support the socket-member `inthe line ofA the,- principal axis of the reflector: v1".-l`hisflange exemplifies a lamp-member extending int-o' c ranged, for-receiving the pins26 oftheplug the' space from one of the body-membersand f. shown on a flangefpiece 24 suitably rigidly securedto the reflector, as bjyfsolderlng'.I

The socket-member ,is provided with" plug attaching means, exemplified l as,-y bayonet` slots in the'wall of the socket-'lnember, ar

27, exemplifiedy as the plug of the electric light-bulb. .The outer periphery ,of the socket-member and the inner periphery of thenlamp-member therefor are preferably annular and ,preferably` arranged sothat the f f socket-member may have rotary `or axial 'l movement, oramovement which isV the sum of these two movements, in said flange or lam p-member, -aA resilient part beingT "prof vided vvith relation to which said socket`- 'i member has ,movement, the latter` member and said socket i member having rcomplej` mentalcoacting surfaces arranged orvper.` `mittingsaid movements .of lsaid socketmember and holding said socket-member in ad# justedfpositons.; v

There is a' connection 'between the laI`r-1p V member andl the socket-member Wherebyj either axial movement 1or rotary .movement or both said movementsv` of thesocketmerm ber are limited, and 'means are further prov lvlided comprisinga rotatvely movable member, Which,'during1a.portion of the rangevof l f rotative movement lof the socket-member, is

inactive, and Vduring another portion- .of the movement of the"socket-1nember is active.

Thus the socket-member is provided with protuberances 31 and depressions 32; extend ing in -a plurality of directions crossing each other. ,4 The coacting member ofsaid surfaces is shown as a sloe 33,.Wl 1ich 1s received through anA opening 34m the flange 23, they inner end of the shoe having a. surface Which is complemental-to the retardin'g outer sur- 4face of the socket-member, Vas by forming its inner end tapering for being received in the depressions of the socket-member- 'lhefsocket-member is providednwith'a reg cess 36, the `recess-,beingshown as extending vlengthwise ofv thesocket-memberand provided yWiththeside Walls 5 7, 38, andv end Walls 39, 40. A nger 41 is received in this recess and is shown ,on a plate 42, illustrated as acurved plate received vabout the periph-A I ery of the` flange, theAV linger projecting throughan opening 43 in thejflange and thence ,into the` recess 36. The opening is providedwith side vWall ls 44, 45, and With. `end Walls 46, 47, these Walls limitingthe range of. movement fof the finger 41. e

LThe shoe is mpunted yon a spring 51, shownk as :aband spring,4 curved to be received about the flange, the band preferablyl extendingfinore than half Way around the v4ange, so that-itvvill be retainedcn `said flange byits spring pressure, and arranged yto `,be releasably received .thereabout It preferably y also is vreceivedv about thefplate for holdingl said plate in place and prefrerably providing'pressure'upon said plate for friction'al resistance toy movement of the latter. y e e The end of the spring is curved outwardly, as shown `at 5 2. The construction lis such the socket-member for continuously main- 'taining resilient contact .betweensaid shoe and said .socketlmemben l Proximate protuberan'ces and depressions are. I closely adjacentto each' other "for providing minute?V .ness of focal adjustment. j l

Thesoeket is, inthe present eifempliication' of my invention, sho'wnas a twofterminal socket rcomprising terminals 53, 54, 4urged vltowardthe Iterminals 55,y 56, of the plug,

instanced as'the plug'of the light-bulb, by means of. springs 57, 58, located in thesleeves '59, 60, shown'in F igs. 1, 2,3 and 7 as form ing `binding posts,- fromiwhich flexible electric conductors 61, 62, extend to a usual outer socket 63 suitably lsecured'in the outer casl ofthe electric lamp,v The outer electric 'conducting plug 64 having the flexible elec- "tric outer. conductors 6 5, 66, electrically connected therewitlnisy arranged to be releas-y ably' secured inthe outer'socket 63by means v(if-bayonet connections 67, for forming elec- Atric connection between the conductors 65,

66,- and the respective conductors' 61, -62,

through usual terminals ofthe outer plug.

` The sleeves 5 9, 60, arev suitably insulated from the socket-tube 21 by meansof a body .Y 68 of'insulating material surrounding said The plug of the `electric light-bulb is arranged to be receivedA in its socket, sotliat in'v forming ythe bayonetfco'nnection there! With, its terminals 55,56, will press the terminals 53, 54,-of the socket aXiall-y,ffor-mak ing good electric connection therewith, the springs 57, 58, resisting this axial movement.

'.Ehe holding properties of the shoe- 33 and spring 51 Willordinarily not be' sufficient to `counteract the manual force exerted in. ro-

'tary and axial lines'in fconnecting the plug with the socket member, inconsequenee'of `which the socket-member will be pushed axially and rotated by the plug. This axial movement is a rearward movement whenV the plug to be attached is the'plug ofthe electric light-bulb. e

-It is sometimes desired that the adjustmentof the. electric lightvbulb to desired that the-spring` may befreadilypushed about 'theliange andv plate 42 in assembling the.

parts. l-The'sp'rng urges theshoe 33 toward Ifocus in the reflector be accomplished from n the outside of the lamp and that the out- 'side'plug for connectingthe Aoutside electric conductors be attached to the soeket-mem ber. I4 have exemplified such a structure `in l Figs. 8 and 9, in which the parts heretofore described are designated byy similar but l primed reference numerals. The socket is similar in structure to Figs. 1 to 7 f inclusive, the'fso however, received through a central aperture" 71 in @aacute being,

the rear end of the outer casing of the lampl line of the body, this aperture being in the principal axis of thereilector. The socket is further provided withV rear terminals 7 2, 73, projecting outwardly from the sleeves 59,

plug and outer end of the socket-tube or- 60, andl arranged tohave contact made therewith bythe terminals .'7 4, "le, of an outerplug 76, with whichouter ieXible electric ,conductors 77, 78, electrically connect.

The outer end of the socketstubeI or member is provided with bayonet slots 79 in which the pins. 80 on the plug 76 are received for forming bayonet connection between the consequence of which the socket-member will be pushed axiallyV inwardly the outer plug. This axial and rotated by movement is, in the present exempliication, aiorward movement.

i My improved construction provides a wide rangemf rotative and axial movements, or a wide range of mo-vement which is the sum of these two movements of the electric.

light-bulb, for .its adjustment to desired focus, but limits the axial movement for perl mitting the attachment of the plug of the electric li gilt-bulb to the socket-member from the inside of the reflector, or the attachment "of an outside connector-plug, such as the plug 26, to the outer end of the socket-mem* ber, when such structure is desired, and also prevents=excessive rotary movement of the socket for preventing twisting or tangling of the i'exibleelectric conductor or conductors at the rear'end of the socket.

The limit of axial movement of the socketmember is provided by contact of the end walls 39, 40, with the finger 41, the movenient of the" finger axially being vlimited by the end walls 46, 47 of the opening 43 in the flange or lamp-member, as clearly seen in The rotative movement of of' the linger 36 of the socket-member and with the side walls 44, 45, of the opening 43 in the flange,

as clearly seen by comparison of Figs. 4, 5

the opening 43- in the and 6, the presence of range of rotative flange permitting a' wide adjustment while allowing the recess 36 to be made comparatively narrow, thereby avoiding the cutting away of much metal of the socket-tube or member.

Myv 'inventionV further ffprovides ready illustrated-I` in f' 4the flange and plate,

constructed, the socket-member, finger-piece and spring being constructed and assembled as'separate parts. The socket-tube ormember is arranged to be: received in the lamplmember or 4flange with the recess 36 and ,assembling the parts in readilydetachable relation. y

Having thus fully described my invention, what l claim as new and desire to secure by Letters Patent, is:

1. ln an electric a reflector, guided by the latter, means whereby said socketmember is manually about the line of the principal axis of said refiector, and a movement-limiting part arranged -to be moved rotatively by said socket-member and said 'socketsmember arranged to be moved r-otatively relative to said movement-limiting part, said lampmeinber arranged for limiting the rotative movement of said movement-limiting part,A

duringv said rotative movement of' said socket member relative vto said ."movementlimiting part.

2. In an electric lamp, the combination of a reflector, alamp-member, a socket-member guided by the latter for movement in any direction lengthwise of and rotatively about the line of the principal axis of said reflector, means remaining automatically effective lamp, the combination of" a lamp-member, a socket-member arranged for movement 'l'inieans for assembling the parts and pro'-., vvides parts which .are easily and cheaply ffor retaining said socket-member inadjusted positions, and a member coasting with said socket-member limiting said rotative movements of said socket-member arranged for being rotatively moved by said socket"-` member, and said socket-member arranged to be inovedrotatively relative to said'lastnamed member. n

3. In an electric lamp, the combination of a reiiector, a lamp-member, a socket-member provided with' retardant surface-formations -having movement in said lampmember in any direction lengthwise of or rotatively about the line of the principal axis of said reflector, a position-retaining part provided with a coasting surface, a shiftable movementflimiting part for said socket-member, and resiliently acting means for said position-retainingpart and for rictionally' holding said movement-limiting part.

` 4, In an electric lamp, the combination oi a reflector, a flange about .the line ofthe principal axis 'of said reflector, a socket- -130 member therein guid d thereby and having movement vin said flange in any direction lengthwise'of' or rotatively about said line, said socket-member Vprovided with an opening, said flange provided 4With an opening, a

linger `received through said opening in said flange into said opening in' said socket-member, said openings having end Walls and side Walls, the side Walls of one of said openings being spaced apart substantially greater than the thickness of said finger, and the respective end Walls and side `Walls of' the other of said openings being vspaced apart ysubstantially greater than the'thickness of said finger, a positioirretaining part coacting With said socket-member, anda springband received about saidv flange acting on said last-named part and on said finger whereby said socket-1nember has movement in said lamp-meinber in any direction lengthwise of or rotatively about the line of the principal axis of said reflector and said movements in each of said directions is liniited.

'j 5. I n an electric lamp, the combination of a reflector, a flange about' the line of the principal axis of said reflector, a socket member therein arranged whereby said socket-member has movement in said flange in any direction lengthwise of or rotatively about the line of the principal axis of said reflector, said 'socket-member provided with a recess, said flange provided ,With an openJ ing, said recess and opening having end' VWalls and side Walls, and a linger-plate provided vvith a finger received through said opening inte said recess, the VWalls of said recess being movable With relation to said finger during a portion, of. the range of -movement of said socketemember, and said linger being movable with relation to the Walls ofV said opening during another porn tion of the 'range 'of movement of said socket-member.

G. In an electric lamp, the combination of .a reflector, a lamp-member in the form of a flange about the line of' the principal axis'of the reflector, a socket-member having movement in said flange in any 'direction lengthivise 'of or about said line of said principal axis, said socket-member provided with a Y recess having sidewalls and end walls respectively Vspaced apart, said flange proo vided with an opening having side Walls and end walls, a finger-plate about said flange having a finger received .through said opening into said recess, and a position-retaining part for said socket-member comprising a spring-band received about said flange and said 'finger-plate whereby said finger-plate isfrictionally held about said lian'ge.

7. In an electric lamp, the combination of a reflector, a lamp-member in the form of a flange about the line of the principal axis of the reflector, a socket-memberl having .movement in said flange in any direction lel'igthwise of or about said line, said s0cketmember provided with a recess having side Walls and end Walls respectively spaced apart, said flange provided with an opening havingside Walls and end Walls, a fingerplate about said flange having a finger receivedthrough said opening into said recess, and a position-retaining part for saidv socket-member comp-rising a spring-band received about said flange and said lingerplate whereby said linger-plate is friction ally held abord, said flange, said socket-member having movement with relation 'to said iii-iger throughout the range of the space between said finger and the Walls 'of said recess and said finger-plate moved by said socket-member throughout. the range of the space between said finger and the Walls of said opening;

8. In an electrielamp, the combination of a casing and a reflector having a spacel therebetween, a flange in saidv space about the line of the principal axis of the 'reflector, a socket memberjin said flange, said socket-member provided With a recess, said liange provided with .an opening, a fingerplate about said flange provided With a finger extending through Said'opEning into said recess, a shoe received through said `flange against said socketsrne'mber, and a scribing witnesses.

EUGENE A. KUHN.

5Witnesses I THnRnsA M. SILBER,

CHARLES E. WEBER. 

